An urn B1 contains 2 white and 3 black chips and another urn B2 contains 3 white and 4 black chips. One urn is selected at random and a chip is drawn from it. If the chip drawn is found black, find the probability that the urn chosen was B1.

4‚Äö√Ñ√∂‚àö√ñ‚àö√´7

3‚Äö√Ñ√∂‚àö√ñ‚àö√´7

20‚Äö√Ñ√∂‚àö√ñ‚àö√´41

21‚Äö√Ñ√∂‚àö√ñ‚àö√´41

An urn B1 contains 2 white and 3 black chips and another urn B2 contai

1.	An urn B1 contains 2 white and 3 black chips and another urn B2 contains 3 white and 4 black chips. One urn is selected at random and a chip is drawn from it. If the chip drawn is found black, find the probability that the urn chosen was B1.
A.	<sup>4</sup>‚Äö√Ñ√∂‚àö√ñ‚àö√´<sub>7</sub>
B.	<sup>3</sup>‚Äö√Ñ√∂‚àö√ñ‚àö√´<sub>7</sub>
C.	<sup>20</sup>‚Äö√Ñ√∂‚àö√ñ‚àö√´<sub>41</sub>
D.	<sup>21</sup>‚Äö√Ñ√∂‚àö√ñ‚àö√´<sub>41</sub>
Answer» E.

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An urn B1 contains 2 white and 3 black chips and another urn B2 contains 3 white and 4 black chips. One urn is selected at random and a chip is drawn from it. If the chip drawn is found black, find the probability that the urn chosen was B1.

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